Re: Linux 2.4.34-pre1
From: Adrian Bunk
Date: Wed Aug 16 2006 - 19:52:36 EST
On Wed, Aug 16, 2006 at 10:36:33PM +0000, Willy Tarreau wrote:
> Hi !
> I've been reluctant at first for the usual reasons : "who has a 2.4
> distro with gcc4 ?", and after recalling all the trouble Marcelo
> had to deal with during the gcc3 update. But after discussion with
> some people, I realized that the problem is not here, it's for the
> kernels those people have to maintain for other systems (eg: servers,
> firewalls, etc...) and which they suddenly cannot build anymore after
> they have updated the distro on their desktop PC.
> Since most of them were sleeping bugs waiting for someone to wake
> them up, I considered it was worth merging them provided that we
> observe no regression. So I have created a separate tree for it
> that I will merge into mainline in a few pre-releases if we don't
> encounter any problem.
My points against allowing to compile kernel 2.4 with gcc 4 are:
- There isn't much testing coverage - and will never be much testing
coverage - of using a kernel 2.4 compiled with gcc 4.
We've already seen several cases where only some compiler versions
caused miscompilations or exposed a runtime bug in the kernel.
Since there shouldn't be any reason for still using a 2.4 kernel
except for "never change a running system", I don't see a good
reason for allowing such an untested gcc/kernel combination.
- Even if your distribution does no longer ship any gcc 3, it's
easy building and using your own gcc 3.4.6:
tar xjf gcc-3.4.6.tar.bz2
../gcc-3.4.6/configure --enable-languages=c --prefix=/usr/local/gcc-3.4.6
# change HOSTCC and CC in the toplevel Makefile of the kernel:
# HOSTCC = /usr/local/gcc-3.4.6/bin/gcc
# CC = /usr/local/gcc-3.4.6/bin/gcc
Gentoo kernels are 42 times more popular than SUSE kernels among
KLive users (a service by SUSE contractor Andrea Arcangeli that
gathers data about kernels from many users worldwide).
There are three kinds of lies: Lies, Damn Lies, and Statistics.
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